(under subclass 501) Subject matter having at least three relatively movable contact members (or contact member guides) arranged so that their object-contacting points contact the object in a straight line and are so interconnected that while the distances between the contact points may be selectively increased or decreased, the ratios of the distances between them at successive settings remain the same.
(1) Note. One or more of the object contacting members may also function to mark the object.
(2) Note. The guides provided for in this subclass and the subclasses indented hereunder are used generally in conjunction with markers which may not be part of the claimed invention but which are used to mark the object at points
designated by the guide.
SEE OR SEARCH THIS CLASS, SUBCLASS:
670+, for proportionally repositionable contact members which do not contact the object at points lying in a straight line and which also have a marker for locating and marking the center of the area defined by the contact members.
